216661874346733 has 4 divisors (see below), whose sum is σ = 216663446879488. Its totient is φ = 216660301813980.

The previous prime is 216661874346679. The next prime is 216661874346793. The reversal of 216661874346733 is 337643478166612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216661874346733 - 2¹³ = 216661874338541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216661874346793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 786059691 + ... + 786335272.

It is an arithmetic number, because the mean of its divisors is an integer number (54165861719872).

Almost surely, 2^{216661874346733} is an apocalyptic number.

It is an amenable number.

216661874346733 is a deficient number, since it is larger than the sum of its proper divisors (1572532755).

216661874346733 is a wasteful number, since it uses less digits than its factorization.

216661874346733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1572532754.

The product of its digits is 438939648, while the sum is 67.

The spelling of 216661874346733 in words is "two hundred sixteen trillion, six hundred sixty-one billion, eight hundred seventy-four million, three hundred forty-six thousand, seven hundred thirty-three".